Stephen ivan fekete



S. I. FEKETE.

MUFFLER FOR INTERNAL comsusnou ENGINES.

APPLICATION FILED FEB. 23. 1918.

1,305,347. Patented June 3, 1919.

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INVEN'H] v: Jail. 20 w %C4/m(r9t SJ A1Ty5- UNITED STATES PATENT OFFICE.

STEPHEN IVAN FEKETE, 0F DETROIT, MICHIGAN, ASSIGNOR TOESSEX MOTORS, OFDETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

MUFFLER FOR INTERNAL-COMBUSTION ENGINES.

Application filed February 23, 1918. Serial No. 218,656.

To all whom it may concern:

Be it known that I, STEPHEN I. F nKnTE, a subject of the King ofHungary, residing at Detroit, county of Wayne, State of Michigan, haveinvented a certain new and useful Improvement in Mufliers for Internal-Combustion Engines, of which the following is a specification, referencebeing had therein to the accompanying drawings.

My invention has for its object a new and improved mufller forapplication to the exhaust of internal combustion engines. The

particular object of the invention is to provide a mufiier which can bemade inexpensively and which shall completely mufile the exhaust of theengine without producing objectionable back pressure. Another object ofmyinvention is to produce a muffler which can be taken apart and cleanedwith a minimum of effort.

The invention will be fully understood from the following descriptionwhen taken in connection with the accompanying drawings and the novelfeatures thereof will be pointed out and clearly defined in the claimsat the close of this specification.

In the drawings, Figure 1 is a longitudinal section of a mufllerembodying my invention.-

Fig. 2 is a section taken on line 2--2 of Fig. 1.

Referring now to the drawings, at 11 is shown the exhaust pipe and at 12a support therefor. The outer shell of the muffler comprises afrusto-conical shell 13 the small end of which is of substantially thediameter of the exhaust pipe 11, a cylindrical portion 14 and a secondfrusto-conical portion 15 the base of which is toward the base ofthe'first mentioned frusto-conical portion. To the small end of thefrustoconical section 15, is secured a discharge nozzle 16. At 17 isshown a supporting bracket similar to the supporting bracket 12 alreadyreferred to. Each of the sections 13, 14 and 15 which together comprisethe exterior shell ofthe mufiler is provided with out-turned flanges 18through which pass bolts 19 securing the parts together.

Located within the mufller shell are two partitions 20 and 21. Thepartition 20 'which is nearest the intake end of the muf flanges 18,; 18of the frusto-conical shell 13' and cylindrical shell 14 respectively.'The largest diameter of the conical partition 20 is considerably lessthan the large interior diameter of the frusto-conical portion 13 sothat the flange 22 is of a width sufiicient to admit of a series ofperforations 23. The

. point of the conical partition 20 is toward the intake of the mufiier.The partition 20 and the shell 13 together form a diverging space thewalls of which converge toward the perforated flange 22.

The partition 21 is frusto-conical in shape and has a flange 24 insertedbetween the perforated flanges 1'8, 18 of the cylindrical shell 1 1 andthe frusto-conical shell 15. The frusto-conical partition 21 taperstoward the intake end of the manifold but is open at its end as shown at25 and contains a series of perforations 26 about its sides but saidperforations preferably are all located nearer the intake endof themuffler than are the perforations 23 in the flange 22. By this means,direct flow through the mufller is prevented aswould result if the.perforations 26 were located nearer theexhaust end of the mufller thanthe perforations 23. The space between the conical partition 20 and thefrusto-conical partition 21 is somewhat constricted in the "direction offlow. and therefore tends to checkth'e velocity of flow of theexhaust'gases. The holes 23 and 26 break up the flow and assistmaterially in rendering the exhaust quiet.

After passing through the perforations 26 the exhaust gases expandgradually within the partition 21 and then pass into the frusto-conicalshell 15. They finally escape into the atmosphere through theconstricted nozzle 16. The mufller is of such a construction that theexhaust gases on entering the mufiier expand as they pass through theshell 13; their direction is then changed after passing through theperforations 23 and again after passing through the perforations 26.Throughout the entire distance the heat contained in the gases is beingradiated from the exterior of the muflier so that the tendency to expandsuddenly is reduced.

The mufiler embodying my invention is very inexpensive tomanufacture-and to assemble and is thoroughly effective for the purposesintended. When it is desired to clean the mufller, this may be easilyand quickly done by removing the bolts 19 after Specification of LettersPatent. Patented June 3, 1919. Y

which the "parts of the shell and the interior partitions may beseparated and cleaned.

What I claim is:

1. The improved mufiier for internal combustion engines comprising afrusto-conical shell section, a cylindrical shell section, a secondfrusto-conical shell section, said parts arranged with the large ends ofthe frusto-conical sections abutting the ends of the cylindricalsection, a conical partition within the said shell sections the apexpointing toward the inlet end of the mufller and a second partition ofconical shape and having its small end pointing in the direction of theinlet end of the mufiler, said partitions being perforated theperforations in the partition which lies nearer the exhaust end of themuflier being nearer the inlet end of the mufiier than are theperforations in the partition which is nearer the inlet end of themuffler.

2. The improved. exhaust mufller which comprises ashell made up of twofrustoconical end sections arranged base to base aeoaaer with acylindrical section connecting them, a conical interior partition, theapex of which is toward the-intake end of the muffier, and having aflange about its base interposed between the contacting edges of thecylindrical center section and the inlet end section, said partitionbeing perforated about its base and a frusto conical interior partitionthe small end of which is open and extends toward the inlet end and intothe interior of the other partition, said second partition having animperforate flange about its base interposed between the contactingedges of the cylindrical center section and the outlet end section sothat the exhaust gases enter through one frusto-conical end section intothe cylindrical section, and pass thence back between said twopartitions, and thence through the frusto-conical interior partition,and out through the second frusto-conical end section.

In testimony 'WhGI'QOfI aflix my signature.

STEPHEN IVAN FEKETE.

